21031431000259 has 2 divisors, whose sum is σ = 21031431000260. Its totient is φ = 21031431000258.

The previous prime is 21031431000211. The next prime is 21031431000329. The reversal of 21031431000259 is 95200013413012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21031431000259 - 2¹⁷ = 21031430869187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21031431000259.

It is not a weakly prime, because it can be changed into another prime (21031431000659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515715500129 + 10515715500130.

It is an arithmetic number, because the mean of its divisors is an integer number (10515715500130).

Almost surely, 2^{21031431000259} is an apocalyptic number.

21031431000259 is a deficient number, since it is larger than the sum of its proper divisors (1).

21031431000259 is an equidigital number, since it uses as much as digits as its factorization.

21031431000259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 21031431000259 in words is "twenty-one trillion, thirty-one billion, four hundred thirty-one million, two hundred fifty-nine", and thus it is an aban number.